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Tomcat problem while reading Data from Xml file

Harish Tiruvile
Ranch Hand

Joined: Dec 01, 2005
Posts: 99
Hi,

I am trying to invoke a servlet which extract data from xml file.
I am facing one problem while invoking servlet..After entering url if i press "ENTER" button tomcat will shutdowm immediatly without showing error message..so i am not able to find where i made mistake..

While starting tomcat i noticed

***************************************************************************
Sep 6, 2006 2:09:18 PM org.apache.coyote.http11.Http11BaseProtocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
Sep 6, 2006 2:09:18 PM org.apache.coyote.http11.Http11BaseProtocol init
INFO: Initializing Coyote HTTP/1.1 on http-8009
Starting service Tomcat-Standalone
Apache Tomcat/4.1.32
Sep 6, 2006 2:09:19 PM org.apache.commons.digester.Digester error
SEVERE: Parse Error at line 345 column 11: The content of element type "web-app"
must match "(icon?,display-name?,description?,distributable?,context-param*,fil
ter*,filter-mapping*,listener*,servlet*,servlet-mapping*,session-config?,mime-ma
pping*,welcome-file-list?,error-page*,taglib*,resource-env-ref*,resource-ref*,se
curity-constraint*,login-config?,security-role*,env-entry*,ejb-ref*,ejb-local-re
f*)".
org.xml.sax.SAXParseException: The content of element type "web-app" must match
"(icon?,display-name?,description?,distributable?,context-param*,filter*,filter-
mapping*,listener*,servlet*,servlet-mapping*,session-config?,mime-mapping*,welco
me-file-list?,error-page*,taglib*,resource-env-ref*,resource-ref*,security-const
raint*,login-config?,security-role*,env-entry*,ejb-ref*,ejb-local-ref*)".
at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Un
known Source)
at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.handleEndElement(Unknown S
ource)
at org.apache.xerces.impl.dtd.XMLDTDValidator.endElement(Unknown Source)

at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(
Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContent
Dispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Un
known Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Sour
ce)
at org.apache.commons.digester.Digester.parse(Digester.java:1647)
at org.apache.catalina.startup.ContextConfig.applicationConfig(ContextCo
nfig.java:220)
at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:57
9)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfi
g.java:181)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl
eSupport.java:119)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:3
643)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1147)

at org.apache.catalina.core.StandardHost.start(StandardHost.java:696)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1147)

at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:310
)
at org.apache.catalina.core.StandardService.start(StandardService.java:4
49)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:221
2)
at org.apache.catalina.startup.Catalina.start(Catalina.java:458)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:345)
at org.apache.catalina.startup.Catalina.process(Catalina.java:129)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:150)
Sep 6, 2006 2:09:26 PM org.apache.coyote.http11.Http11BaseProtocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Sep 6, 2006 2:09:26 PM org.apache.coyote.http11.Http11BaseProtocol start
INFO: Starting Coyote HTTP/1.1 on http-8009

***************************************************************************

If any one knows where i made mistake please assist me
[ September 06, 2006: Message edited by: harish thrivile ]

Giving up is the easiest thing in the world to do..but holding it together when everything seems like falling apart is true strength!!
with regards, Harish.T
Paul Sturrock
Bartender

Joined: Apr 14, 2004
Posts: 10336


SEVERE: Parse Error at line 345 column 11: The content of element type "web-app"
must match "(icon?,display-name?,description?,distributable?,context-param*,fil
ter*,filter-mapping*,listener*,servlet*,servlet-mapping*,session-config?,mime-ma
pping*,welcome-file-list?,error-page*,taglib*,resource-env-ref*,resource-ref*,se
curity-constraint*,login-config?,security-role*,env-entry*,ejb-ref*,ejb-local-re
f*)".

Looks like you have not defined your web.xml file as per the DTD. When xerces parses this file it is checking that each element is as it should be based on the DTD. Hava a look at the DTD and check you have defined web.xml as it is required.


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Harish Tiruvile
Ranch Hand

Joined: Dec 01, 2005
Posts: 99
Thank you Paul Sturrock for replying

But in this example i am not validating data...

I am pasting complete code here if anyone knows the where i made mistake please guide me to resolve that error

Main sevlet class



Utility class used for extracting data from XMl file placed inside class folder inside WEB-INF



I am storing this two class files and EventLog.xml files in webapps\examples\WEB-INF\classes

After writing URL-Mapping i web.xml..i tryed to invoke servlet by entering URL in Browser http://localhost:8080/examples/readXML

But immediatly tomcat gets shutdown....If anyone trace out where i made mistake from above code then please guide me in resolving this issue...or else if you know any tutorials link for "SERVLET & reading XML" please post that here

[ September 06, 2006: Message edited by: harish thrivile ]
[ September 06, 2006: Message edited by: harish thrivile ]
Paul Clapham
Bartender

Joined: Oct 14, 2005
Posts: 18987
    
    8

Where did you make your mistake? It was assuming that the code you posted had anything to do with the problem. If you look at the stack trace you posted, you don't see ReadCompleteErrorReport anywhere in it, do you? So ReadCompleteErrorReport has nothing to do with the problem.

If you look a little closer you see methods with names like "ContextConfig.start" and "ContainerBase.start" and "Catalina.start". It's pretty clear that Tomcat is just starting up, and failing to parse your web.xml file because (as Paul Sturrock already said) it isn't valid according to the DTD.
Harish Tiruvile
Ranch Hand

Joined: Dec 01, 2005
Posts: 99
Thank you Paul Sturrock ,and Paul Clapham for replying

Now i resolved the issue...problem is with PrintWriter object....
 
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subject: Tomcat problem while reading Data from Xml file